inb4PSU
Yes.
Personally, no because if you look at China and other atheist countries, they're miserable and only really care about money and power.
Stalin, Mao, Hitler, and Pol Pot were all atheists and killed millions of people. I'm inclined to think there doesn't exist a single, murderous dictator that isn't atheist.
You don't actually believe they were atheists, correct? Hitler said he did what he did as work for God.
I've seen no credible evidence to suggest Hitler was atheist, if we're only going by his own words it's likely he was Catholic.